18504874725 has 48 divisors (see below), whose sum is σ = 32458874880. Its totient is φ = 9276120000.

The previous prime is 18504874721. The next prime is 18504874727. The reversal of 18504874725 is 52747840581.

It is a happy number.

It is not a de Polignac number, because 18504874725 - 2² = 18504874721 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18504874721) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 129850 + ... + 232100.

It is an arithmetic number, because the mean of its divisors is an integer number (676226560).

Almost surely, 2^18504874725 is an apocalyptic number.

18504874725 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18504874725 is a deficient number, since it is larger than the sum of its proper divisors (13954000155).

18504874725 is a wasteful number, since it uses less digits than its factorization.

18504874725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102410 (or 102405 counting only the distinct ones).

The product of its (nonzero) digits is 2508800, while the sum is 51.

The spelling of 18504874725 in words is "eighteen billion, five hundred four million, eight hundred seventy-four thousand, seven hundred twenty-five".